Model	SAE Class	Capacity (For gross trailer weights up to...)	Ball Size	Housing Width (Inside)	Repair Kit
940P-1	1	2,000 lb / 907 kg	1-7/8"	2"	6256
960P-1	1	2,000 lb / 907 kg	1-7/8"	2-1/2"	6256
970P-1	1	2,000 lb / 907 kg	1-7/8"	3"	6256
980P-2	2	3,500 lb / 1,588 kg	2"	3"	6257
981P-2	2	3,500 lb / 1,588 kg	2"	2"	6257
982P-2	2	3,500 lb / 1,588 kg	2"	2-1/2"	6257
985P-3	3	5,000 lb / 2,268 kg	2"	3"	6257
995P-4	4	6,000 lb / 2,722 kg	2"	3"	995
990-3	3	5,000 lb / 2,268 kg	2"	A-Frame	6257

SAE Class Specs For Non-Passenger Carrying Trailers:
1 - For gross trailer weights up to 2,000 lb / 907 kg
2 - For gross trailer weights up to 3,500 lb / 1,588 kg
3 - For gross trailer weights up to 5,000 lb / 2,268 kg
4 - For gross trailer weights between 5,000 lb / 2268 kg and 10,000 lb / 4,536 kg