Model Number: SE-PB-03 Key Specifications/Special Features: Resistance band #4, #3 and #2 combo pack -- purple band 3.2cm wide -- black band 2.1cm wide -- red band 1.3cm wideGreat for assisted pull ups, weight lifting, pilates, yoga, stretching as well as any other body weight assisted exercisesPurple band provides 40 - 80lbs of resistance, black band provides 30 - 50lbs of resistance -- red band provides 10 - 35lbs of resistanceProfessional quality 100% natural latex material -- length: 41" loop -- thickness 3/8" -- these bands are designed for everyday use and are favorites of commercial gyms and personal trainersAll JoyiQi athletics exercise bands come with an Industry leading 2 year warranty - we stand behind our products 100% -- if you aren't satisfied with the quality of our products we will fix it, guaranteed.Athletics #2, #3, #4 set of resistance bands is the ideal combination for your entire range of body weight exercises. Assisted body weight exercises are the best way to gradually strengthen the core muscles in the body without risking injury that can be introduced by using too heavy of weights and overexerting specific muscle groups before they are properly strengthened.For pull up assistance:This set will satisfy the needs of most people of varying conditioning levels in the 100 to 250lb weight range. Use a single band or group multiple bands together to provide adequate assistance.
For resistance exercises:

These bands are ideas for building core strength through varying resistance levels. Great for Crossfit, Pilates, P90X as well as all other resistance exercise requirements.

Choosing the right bands:

Every person is different and the amount of assistance/resistance varies according to weight and fitness level. Listed below is a chart of the assistance/resistance offered by each individual band. Each band has an identical length of 41" and can be stretched to a length of over two times it original length making these bands suitable for individuals from 5 feet to 7 feet tall. Multiple bands can be used together to provide a wide range of assistance levels.

1/2" red band (#2) -- 10 - 35lbs
3/4" black band (#3) -- 30 – 50lbs
1 1/8" purple band (#4) -- 40 - 80lbs