Search query: b4-4 rocket engines

Product: Estes A8-3 Engine Pack (3-Each)
Brand: Estes
Relevance: Substitute
A8-3 Engines, 3 - Starters, 4 - Starter Plugs
This engine is a standard engine designed for flights in rockets weighing less than 3 ounces, including the engine
Single stage engine

Product: Estes Model Rocket Motor B4-2 1601 Parcel Select Shipping Required
Brand: Estes
Relevance: Exact
Estes B4-2 Motors Ground Shipping Required 18mm Model Rocket Motors 3 Pack including starters and plugs. Time delays: 2 seconds
3 pack

Product: LEGO City Space Deep Space Rocket and Launch Control 60228 Model Rocket Building Kit with Toy Monorail, Control Tower and Astronaut Minifigures, Fun STEM Toy for Creative Play (837 Pieces)
Brand: LEGO
Color: Multicolor
Relevance: Exact
Build a large multi-stage rocket and opening launch control tower with interactive play experience, plus a monorail system to transport astronauts from the tower to the training grounds and rocket!
Includes 6 LEGO City minifigures: 2 astronauts, 2 scientists, Launch Director, ground crew technician and a robot figure, plus a space telescope, rover with articulated arm and a launchpad
Rocket standing measures over 16” (42cm) high, 4” (11cm) wide and 2” (6cm) deep Launch Control closed measures over 7” (18cm) high, 5” (13cm) wide and 5” (13cm) deep Launchpad with closed tower arms measures over 9” (24cm) high, 4” (12cm) wide and 4” (12cm) deep Monorail track measures over 3” (8cm) high,14” (36cm) long and 18” (47cm) wide
837 pieces – Inspired by NASA astronaut toy for boys and girls aged 7+ and for fans and kids of all ages
This LEGO City Deep Space Rocket and Launch Control 60228 NASA-inspired gift set makes a great gift for kids and can be built together with all other original LEGO sets and LEGO bricks for more creative play