SM2-D: for springs up to 1000 N SM5-D: for springs up to 5000 N
SM2-D: for springs up to 1000 N
SM5-D: for springs up to 5000 N
SP2: for springs up to 1000 N SP5: for springs up to 5000 N
SP2: for springs up to 1000 N
SP5: for springs up to 5000 N