SP-8 to SP-90 can be customized
SP-8 (allowable load of 15kg)
SP-12 (allowable load of 30kg)
SP-15 (allowable load of 50kg)
SP-22 (allowable load of 160kg)
SP-25 (allowable load of 200kg)
SP-30 (allowable load of 300kg)
SP-45 (allowable load of 500kg)
SP-60 (allowable load of 1200kg)
SP-90 (allowable load of 3500kg)