Tension Knob only for #2433 2430 Pedal Exercisers Pill Aids Attractive lightweight aluminum frame Adjustable Suction and Aspiration Systems Attractive lightweight aluminum frame Adjustable height settings Easy to use push button folding mechanism provides audible click when locked Front cross brace near top of walker allows for full stride Each side operates independently to allow easy movement through narrow spaces and greater stability while standing Vinyl contoured hand grip for added comfort and long lasting wear Rear glide cap allows for walker to slide easily and smoothly over most surfaces (come standard on models with 5 wheels) Folds flat for transport and storage HCPCS* Code: E0135 (without wheels) E0143 (with wheels) 9% kill rate of bacteria and germs significantly reducing the risk of infection from an improperly cleaned CPAP * UV C light is considered to be the safest disinfection option on the market as Ozone used in other systems has been shown by the EPA to cause irritation of the lungs and respiratory system at relatively low amounts * Safe and easy to use Tension can be adjusted for pedlar (10270SV 2)