WHAT YOU NEED TO KNOW New design! Lightweight oversize swing grip Ultra tacky surface for constant contact Twist-resistant stable core Tension-free grip with deep texture for traction SPECIFICATIONS Material Rubber polymer Core size 60 Round Weight 51g Outside diameter Oversize (+3/8") ( JumboMax Sizing Chart)   > JumboMax Installation Instructions (Video) FULL DESCRIPTION   The JMX Ultralite BLACKOUT grips are a breakthrough in grip technology offering the stability and control of our patented JumboMax grips at around half the weight. Not possible until recent manufacturing innovations, the JMX Ultralite BLACKOUT grips are for the player who wants all the stability and control of our oversized grip technology, while retaining the feeling of more weight in the club head. Promotes light, even grip pressure. Maintains the feeling of a heavier club head. Shape: Oversized tapered profile keeps club face square longer. Color: Black Firmness: Maximum Texture: Multi-textured, High-tack, All-weather Polyurethane surface. Vibration Dampening: Moderate. Standard .600 inch core diameter. Length 11⅛" Weight: Small 46g, Medium 47g, Large 49g, X-Large 51g