Overview Reviews Product Description 9.75" long Boom extension kit perfectly matching WBR030-1203-Lampson The boom replicates the 40' boom section. Product Videos Custom Field Product Reviews (No reviews yet) Write a Review Write a Review × Weiss Brothers Manitowoc 4100 - Extension Kit - Lampson Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name *Email *Review Subject *Comments