Key differences for the 2500 are listed in the bullets. HT-100 Carbon Fiber Drag washers (size 2500 only). Spare EVA handle knob. Hydrophobic line roller bearing. 8+1 stainless steel bearing system.
PENN SLAMMER IV 7500 DX Slammer 4 DX 7500th spinning reel offshore reel jigging
PENN Slammer IV Saltwater Spinning Reel - Full Metal, Heavy Duty Spin, Jigging or Lure Fishing Reel - Boat, Shore, Kayak
PENN Slammer IV Saltwater Spinning Reel - Full Metal, Heavy Duty Spin, Jigging or Lure Fishing Reel - Boat, Shore, Kayak, 3500
